Well I can't really help much with equipment but what I do is use a pre amp with a ht bypass. My vinyl goes to a phono stage to the pre and out to the speakers. when I watch ht I select ht bypass and my d2v runs things.
You could Also get a phono pre with a volume control and go right to your speakers but you would have to swap cables when going back and forth to ht.
You could Also get a phono pre with a volume control and go right to your speakers but you would have to swap cables when going back and forth to ht.